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Re: GUIkit problem

  • To: mathgroup at
  • Subject: [mg56719] Re: GUIkit problem
  • From: "Lalu" <BhuvaneshBhatt at>
  • Date: Wed, 4 May 2005 00:34:34 -0400 (EDT)
  • References: <d57h2q$p8q$>
  • Sender: owner-wri-mathgroup at

babazar... at wrote:
> Hello,
> I'm new to Mathematica and GUIkit and wonder why the following
> expressions produce a GUI with only the first label (Hello World1!).
> Needs["GUIKit`"];
> label1 := Widget["Label", {"text" -> "Hello World1!"}]
> label2 := Widget["Label", {"text" -> "Hello World2!"}]
> newlist = {label1}
> Append[newlist, label2]
> HelloWorld[] := GUIRunModal[ Widget["Panel", newlist]]
> HelloWorld[]

You need to use AppendTo instead of Append.

In[1]:= ?Append
Append[expr, elem] gives expr with elem appended.

In[2]:= ?AppendTo
AppendTo[s, elem] appends elem to the value of s, and resets s to the

In[3]:= list = {x}

Out[3]= {x}

In[4]:= Append[list, y]

Out[4]= {x, y}

In[5]:= list

Out[5]= {x}

In[6]:= AppendTo[list, y]

Out[6]= {x, y}

In[7]:= list

Out[7]= {x, y}

Hope this helps.

Bhuvanesh Bhatt,
Wolfram Research.

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